The continual advancement of technology and the increasing complexity of the operational environments for the military have necessitated the proliferation of teambased operations. The use of personality styles is one possible way to go beyond normal demographics when attempting to predict team performance. This study provides an analysis of two personality styles and their potential for predicting team performance. The tenets of Human Systems Integration (HSI) state that it is critical to view the human as a component of any system. This study examined the effect of team personality style on team performance. Additionally, the effect of team command and control organization was examined by building upon the Office of Naval Research's Adaptive Architecture for Command and Control (A2C2) project. The results of the study were inconclusive. There was no significant difference between the performance of teams high in conscientiousness and high in agreeableness (A+C+) and the performance of teams low in conscientiousness and low in agreeableness (A-C-). Furthermore, there was no difference between teams utilizing different command and control organizations. The results of the study reveal that, currently, A+C+ and AC- personality styles are not viable as selection tools Further research concerning the many possible personality styles is required.